National Instruments 780695-01 PXI Digital I/O Device 

National Instruments part number 780695-01 is an identifying part number for the PXIe-6535, a PXI Digital I/O Device. The PXIe-6535 is a 32-channel PXI Digital I/O Module operating at 10 MHz and delivering data rates of up to 40MB/s, making it perfect for seamless data streaming. The PXI Express bus makes it optimal for interfacing and evaluating image sensors or display panels. 

Additionally, it is highly compatible with various digital tasks, including pattern I/O, change detection, protocol emulation, or customized digital interfacing. The module offers selectable voltage levels and per-channel directional control of digital lines, enhancing its versatility and adaptability to diverse applications. The 32 data channels of this module provide per-channel direction control for comprehensive data handling. Each data channel offers individual direction control, providing precise management. Additionally, it includes 6 Programmable Function Interface (PFI) channels, enhancing its versatility for various interfacing needs.

The PXIe-6535 module has multiple generation voltage families, including 2.5V and 3.3V, both of which are compatible with 5V TTL systems. This ensures flexible integration into various setups and applications, accommodating different voltage requirements while maintaining compatibility with existing systems. 

This Digital I/O series is equipped with three bidirectional clock terminals, specifically PFI 4, PFI 5, and RTSI 7. Additionally, it features one exported clock terminal, PXIe_DSTARC, available exclusively on PXI Express. Furthermore, for PXI Express systems, it includes two clock source terminals, PXIe_DSTARA and PXI_STAR, enhancing flexibility and functionality in clock management. When comparing the 6535 module to others in the Digital I/O series from National Instruments, the 6535 offers a clock frequency range of 0MHz to 10MHz. In contrast, the PXIe-6536 features a range of 0MHz to 25MHz, and the PXIe-6537 extends to 0MHz to 50MHz.

This distinction in frequency range highlights the variability among modules in the Digital I/O series. Another notable distinction between the 6535 module and others lies in its maximum data channel toggle rate, capped at 5.0 MHz. In contrast, the 6536 module boasts 12.5 MHz, while the 6537 module offers 25.0 MHz, showcasing variations in performance across the series.